Not particular. The issue is that the game uses a simple system where the penetration drop-off depends on the weight of the shell.
The 105mm HE has more armor penetration than 122mm HEAT-FS, but it’s also 4kg lighter.
The result is that the 122mm HEAT-FS can penetrate less armor by the explosion but the distance from the roof where the round will penetrate, against a Panther G, is still the same.
Technical HESH shells shouldn’t even work the same way as HEAT-FS or HE, since the explosive gets spread over a wide area on contact, instead of staying in one place and being detonated by the impact fuze.
It seems there is infact some system in play, which reduced the effective range of HE penetration by HESH shells, which actually makes sense.
L7 105mm HESH needs to be much closer to the Panther roof to cause overpressure compared to the Swedish Sav m/43s 105mm HE round, which has a similiar weight.
HEAT-FS also shouldn’t pen that much and it doesn’t really make sense to use the shell weight for penetration distance the same way as HE shells do, since the construction is also completely different.